I finally found how to enhance the reliefs crushed by too direct light under PS. It’s simple, but it’s harder to explain without images, so I’ll stick to it, with my keen sense of pedagogy, it’s going to be hot …

To adjust your brush, the closer you go to 255, the higher the lights will go, the closer you get to 0, the more shadows will be accentuated. If you want to erase an effect, reset it with the brush with the value R128, V128, B128 (neutral gray).